coucou
ex3
a) 2+ 3x/5 = 6 + x/4
(3x*4)/(5*4) -5x/(5*4) = 4
7x/20 = 4
7x = 4*20
7x = 80
x= 80/7
b) (x+2)/3 + (x-1)/4 = 5
(4x+8)/12 + (3x-3)/12 = 5
(7x+5)/12 = 5
7x+5 = 60
7x = 55
x = 55/7
c) (x-2)/3-(x+1)/4 = 5
(4x-8)/12 -(3x-3)/12 = 5
(4x-8-3x+3)/12 = 5
(x-5)/12 = 5
x-5 = 60
x = 65
d) 3(2x+1)-9 = 2(2x+1)
6x+3 -9=4x+2
6x-6 = 4x +2
2x = 8
x = 4
voila j espere t avoir aider
